Radio dial knob



M y10,1938. J R YOUNG 2,117,074

RADIO DIAL KNOB Filed may 1, 19:53

Patented May 10, 1938 UNITED STATE nsmo man not James Russell Young, Ann Arbor, Micln, assignor to Barnes-Gibson-Raymond, Inc., MiclL, a corporation of Michigan Detroit,

Application May 1, 1933, Serial No. assess The present invention has to do with means for attaching a knob to a shaft which is to be turned by means of the knob.

- An object of the present invention is to proeasily and simply attached to the knob.

, Another object is to provide a secure and rigid connection between a knob and a' shaft and which will also allow ready and easy removal of the knob from the shaft. W

Another object is to provide a device for 'connecting a knob to a shaft, which device will embody means for preventing relative rotation between such device and the knob.

Another object is to provide a device for attaching a knob to a shaft, which device wlll'comprise means 'for'preventing relative rotation between the shaft and such device.

Another object is to provide a device for connecting a knob to a shaft, which device will pro-. vide a bearing between the knob and the shaft over the entire periphery of the shaft.

A further object is to provide a device for at- 1 taching a knob to a shaft, which device will be simple in construction, which may be easily and cheaply manufactured, but which will be strong and durable.

Other objects and features of novelty will be apparent from the following description and drawing, it being expressly understood. however, that the invention is in no way limited by such description and drawing .or otherwise than by the appended claims.

Referring to the drawing, in which similar reference numerals refer to like parts;

Fig. 1 is a view showing a shaft and knob before being assembled, the knob having the attaching means fitted therein;

Fig. 2 is a sectional view through the knob and shaft on the line 2- -2 of Fig. 3;

3 is a sectional view through the knob and attaching device on the line H of Fig. 2 and I'lg. 4 is an exploded' view showing the shaft;

attaching device and knob in position to be assembled.

Referring now to the drawing, it'will be seen that the reference numeral i denotes a shaft to which a knob I is tobe attached, whereby the shaft may be turned by the. knob. One end of shaft l iscutawayasatltoprovldeailatsurface u l, for a purpose which will appear which will appear hereinafter.

The knob 2 is provided with an opening 5 of circular cross-section extending axially therethrough and into which the end of the shaft is to be received. Extending in a radial directionfrom such opening'is provided a cut or slot 6 -5 which, as shown in Fig. 2, need not extend as far in an axial direction as the opening I. Theslot 6 is preferably relatively small in breadth and should be only a knife-cut in width for a purpose,

-10 Means are provided by. the invention for attaching the knob to the shaft, and such means comprise a sleeve-like element 1 which mayme formed of metalor other suitable material which is of such a length that it may be re-'-15 ceived in the opening Ii in the knob without protruding externally thereof. The member I, which may be termed a spring bushing, may be stamped or formed from sheet metal and is formed as a hollow cylinder throughout approximately 270 of its cross-section. Instead of continuing the deformation of the metal forming the bushing to form a complete, cylinder, the end of the metal is turned inwardly to form a flat portion] which extends as a chord .across the cross-section of the spring bushing. It will thus be seen that a bushing has been formed having a cylindrical portion 9 and a flattened side 8 which are adapted to cooperate respectively with the partially cyllndrical end ofthe shaft I and with the cut-away and flattened portion thereof. The remaining por: tion III of the cylindrical part of the bushing ter minates in the edge ii and, as clearly disclosed in Fig. 4 of the drawing, the mid-portion of the longitudinal length of the portion II is extended beyond the edge II, as at If, to form a tongue which isturned outwardly from the spring bushing a short distance from the edge H, as at I 3, thereby forming a right-angled tongue or lug midway between the ends of the edge II and hav- 40 ing .one portion thereof extending radially outward from the spring bushing l. The outer edge ll of this radially-extending tongue is formed at an angle to'the longitudinal direction of the edge ll, whereby su'oh tongue may be more easily A pushed into the slot 6.

It will be noted that the spring bushing is to be formed with an outside diameter slightly greater than the diameter of the opening 6 in the knob, whereby the bushing may be :tightly resuch that the cut-away and flattened and of shaft s5 I may be tightly received therein and resiliently maintained there by resilient deformation of the flat portion 8 of the spring bushing.

In assembling the device, the spring bushing I the shaft, thereby not only providing a rigid con- Patent No. 2,117,071 r nection but also preventing any possibility of relative rotation between the shaft and the bushing.

While one modification of my invention has JAMES RUSSELL YOUNG.

may 10, 1958.

JAMES RUSSELL Yours.

is inserted into the opening 5 in the knob, as been illustrated and described in the present ap- 5 shown in Fig. 1, and pushed thereinto against the plicatlon, it will be apparent to those skilled in resistance caused by theresilient pressure of the the art that modifications and changes may be spring bushing against the walls of the opening made therein without departing in any way from due to the fact that the Spring bushing is of the spirit of the invention, for the limits of which 10 slightly greater diameter than the opening. The reference must be had to the appended claims. 10

tongue l3, extending radially outward from the What I claim is: I spring bushing, is adapted to enter the slot 6 in 1. A device for attaching a knob to a shaft the knob, and its entry therein is facilitated by comprising a strip of metal bent to cylindrical the slanting configuration of the entering edge-ll shape, one end of said strip forming a flat porthereof, all as clearly disclosed in Fig. 2. Due to tion disposed as a chord of, said cylindrical por- 15 the cooperation between tongue l3 and slot 5 it tion, and the other end of said strip being offset will be apparent that all possibility of the spring radially of said cylindrical portion. bushing turning relatively to the knob is done 2. In combination, a cylindrical shaft having a away with. The spring bushing is forced into portion of the periphery thereof cutaway at one 29 opening 6 until it is entirely disposed therein. end to provide a flat surface, a knob having an When it is desired to attachthe knob to the opening therein within which the end of said shaft, either the knob or shaft may be turned shaft including said flat surface is adapted to be until the fiat portion 8 of the springbushing, received, and means for attaching said knob to which is now disposed within the knob, is said shaft, said means comprising abushing memaligned with the flat face 4 of the cut-away porher having a cylindrical portion lining a part of 25 tion 3 of the shaft, at which time the end of the the wall of the opening in said knob and received shaft may be inserted into the spring bushing. between said wall and the cylindrical surface of Due to the fact that the internal cross-section said shaft end, a second portion extending from of the spring bushing is slightly smaller than the said cylindrical portion across and in yielding cross-section of the end of the shaft, a tight and contact with substantially the entire flat surface 30 rigid connection between the bushing andshaft of said shaft, and a third portion extending rawill be provided, and the flat portion I of the dially from said cylindrical portion and adapted spring bushing will exert av resilient presure to extend into the material of the knob and atagainst the flat face I of the cut-away portion of tach the bushing member thereto.

It is hereby certified that the above numbered patent was erroneous 1y issued to Barnes-Gibson-Raymond,' Inc., of Detroit, Michigan, a cor poration of Michigan, whereas said patent should have been issued to Associated Spring Corporation offDelaware, a corporation of Delaware, as assignee by means assignments, as shown by the records of assign ments in this office and that the said LettersPatent should be read with this correction therein that the same of the case in the Patent Of'fici Signed and sealed this 31st day of llaypar n. 19

(Seal) Henry Van Arsdale Acting Commissioner of Patent'smay conform to the record.

I may be tightly received therein and resiliently maintained there by resilient deformation of the flat portion 8 of the spring bushing.

In assembling the device, the spring bushing I the shaft, thereby not only providing a rigid con- Patent No. 2,117,071 r nection but also preventing any possibility of relative rotation between the shaft and the bushing.

While one modification of my invention has JAMES RUSSELL YOUNG.

may 10, 1958.

JAMES RUSSELL Yours.

is inserted into the opening 5 in the knob, as been illustrated and described in the present ap- 5 shown in Fig. 1, and pushed thereinto against the plicatlon, it will be apparent to those skilled in resistance caused by theresilient pressure of the the art that modifications and changes may be spring bushing against the walls of the opening made therein without departing in any way from due to the fact that the Spring bushing is of the spirit of the invention, for the limits of which 10 slightly greater diameter than the opening. The reference must be had to the appended claims. 10

tongue l3, extending radially outward from the What I claim is: I spring bushing, is adapted to enter the slot 6 in 1. A device for attaching a knob to a shaft the knob, and its entry therein is facilitated by comprising a strip of metal bent to cylindrical the slanting configuration of the entering edge-ll shape, one end of said strip forming a flat porthereof, all as clearly disclosed in Fig. 2. Due to tion disposed as a chord of, said cylindrical por- 15 the cooperation between tongue l3 and slot 5 it tion, and the other end of said strip being offset will be apparent that all possibility of the spring radially of said cylindrical portion. bushing turning relatively to the knob is done 2. In combination, a cylindrical shaft having a away with. The spring bushing is forced into portion of the periphery thereof cutaway at one 29 opening 6 until it is entirely disposed therein. end to provide a flat surface, a knob having an When it is desired to attachthe knob to the opening therein within which the end of said shaft, either the knob or shaft may be turned shaft including said flat surface is adapted to be until the fiat portion 8 of the springbushing, received, and means for attaching said knob to which is now disposed within the knob, is said shaft, said means comprising abushing memaligned with the flat face 4 of the cut-away porher having a cylindrical portion lining a part of 25 tion 3 of the shaft, at which time the end of the the wall of the opening in said knob and received shaft may be inserted into the spring bushing. between said wall and the cylindrical surface of Due to the fact that the internal cross-section said shaft end, a second portion extending from of the spring bushing is slightly smaller than the said cylindrical portion across and in yielding cross-section of the end of the shaft, a tight and contact with substantially the entire flat surface 30 rigid connection between the bushing andshaft of said shaft, and a third portion extending rawill be provided, and the flat portion I of the dially from said cylindrical portion and adapted spring bushing will exert av resilient presure to extend into the material of the knob and atagainst the flat face I of the cut-away portion of tach the bushing member thereto.

It is hereby certified that the above numbered patent was erroneous 1y issued to Barnes-Gibson-Raymond,' Inc., of Detroit, Michigan, a cor poration of Michigan, whereas said patent should have been issued to Associated Spring Corporation offDelaware, a corporation of Delaware, as assignee by means assignments, as shown by the records of assign ments in this office and that the said LettersPatent should be read with this correction therein that the same of the case in the Patent Of'fici Signed and sealed this 31st day of llaypar n. 19

(Seal) Henry Van Arsdale Acting Commissioner of Patent'smay conform to the record. 

